Number of nX3 0..2 arrays with values 0..2 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.
A199650
Number of nX3 0..2 arrays with values 0..2 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.
Terms
- a(0) =5a(1) =113a(2) =2584a(3) =59212a(4) =1357484a(5) =31120632a(6) =713445976a(7) =16355879648a(8) =374961537040
External references
- oeis: A199650